Allow use of rules Policy driver

With the implementation of bp abstract-base-class-drivers , the
"rules" Policy driver couldn't be used anymore because it didn't
implement the methods in the base class.

This change makes it so that the rules Policy driver can be used
again.

bp abstract-base-class-drivers

Change-Id: Ia2a5d42007f7480c2757932afcde35f121e05cab

keystone/policy/backends/rules.py

@@ -101,3 +101,18 @@ class Policy(policy.Driver):
             'action': action,
             'credentials': credentials})
         enforce(credentials, action, target)
+
+    def create_policy(self, policy_id, policy):
+        raise exception.NotImplemented()
+
+    def list_policies(self):
+        raise exception.NotImplemented()
+
+    def get_policy(self, policy_id):
+        raise exception.NotImplemented()
+
+    def update_policy(self, policy_id, policy):
+        raise exception.NotImplemented()
+
+    def delete_policy(self, policy_id):
+        raise exception.NotImplemented()

keystone/tests/backend_rules.conf

@@ -0,0 +1,2 @@
+[policy]
+driver = keystone.policy.backends.rules.Policy

keystone/tests/test_backend_rules.py

@@ -0,0 +1,60 @@
+# Copyright 2013 OpenStack Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+
+from keystone import exception
+from keystone import tests
+from keystone.tests import test_backend
+
+
+class RulesPolicy(tests.TestCase, test_backend.PolicyTests):
+    def setUp(self):
+        super(RulesPolicy, self).setUp()
+        self.config([tests.etcdir('keystone.conf.sample'),
+                     tests.testsdir('test_overrides.conf'),
+                     tests.testsdir('backend_rules.conf')])
+
+        self.load_backends()
+
+    def test_create(self):
+        self.assertRaises(exception.NotImplemented,
+                          super(RulesPolicy, self).test_create)
+
+    def test_get(self):
+        self.assertRaises(exception.NotImplemented,
+                          super(RulesPolicy, self).test_get)
+
+    def test_list(self):
+        self.assertRaises(exception.NotImplemented,
+                          super(RulesPolicy, self).test_list)
+
+    def test_update(self):
+        self.assertRaises(exception.NotImplemented,
+                          super(RulesPolicy, self).test_update)
+
+    def test_delete(self):
+        self.assertRaises(exception.NotImplemented,
+                          super(RulesPolicy, self).test_delete)
+
+    def test_get_policy_404(self):
+        self.assertRaises(exception.NotImplemented,
+                          super(RulesPolicy, self).test_get_policy_404)
+
+    def test_update_policy_404(self):
+        self.assertRaises(exception.NotImplemented,
+                          super(RulesPolicy, self).test_update_policy_404)
+
+    def test_delete_policy_404(self):
+        self.assertRaises(exception.NotImplemented,
+                          super(RulesPolicy, self).test_delete_policy_404)